Question

Write allotropes of five elements with their composition structure properties and industrial uses

Answer 1

Answer:

Multiple Choice Questions

1. The composition of air can be best represented by drawing a:

a. Pie chart b. Bar graph c. Line graph d. Histogram

2. The measurement of small time intervals became possible with the development of

a. Sand clock b. Sundial

c. Pendulum clock d. Water clock

3. The slope of a distance-time graph of a moving object indicates:

a. Distance moved by the.object

b. Time taken by the object

c Speed of the object

d. Position of the object

4. Which of the following is the most appropriate to demonstrate the runs scored in the various

overs of a cricket match?

a. Time graph b. Bar graph c. Pie chart

d. Line graph

5. The clocks and watches which are used for measuring time are based on:

a. Rectilinear motion b.Circular motion c. Periodic motion d. Rotational motion

6. When the amplitude of vibrations of a simple pendulum is increased, then its time-period

a. Decreases b. Increases c. Remain the same d. First increases and then decreases

7. The speed of a moving object is determined to be 0.06 m/s. This speed is equal to

a. 2.16 km/h b. 1.08 km/h

C. 0.216 km/h d. 0.0216km/h

8. Which of the following should be drawn to show the variation of the weight of a

man with age?

a. Bar graph b. Pie chart

c. Line graph d. Histogram

9. Which among the following is the smallest unit of time?

a. Second b. Millenium c. Nanosecond d. microsecond

10. The sundial is a device for measuring

a. Speed

b. Distance

c Time

d. Height

Answer 2

Answer:

Allotropy or allotropism is the property of some chemical elements to exist in two ... Allotropes are different structural forms of the same element and can exhibit quite different physical ... Elemental phosphorus can exist in several allotropes, the most common of which ... The α form is defined as the standard state of the element, but is actually metastable under standard ...